Opening jpeg files with Opera browser

I have an issue with opera browser, since I started using laptop with full HD resolution. I am working with web design and sometimes its is useful to preview my designs in browser environment. When I tried to open jpeg file (1920 px wide) with opera it fits in a browser window and looks too small, when I press a picture to zoom in, it looks blurred an bigger then a screen. The question is, how to zoom a picture 100 proc. to get a 1:1 view?

You can restore the tab's zoom by pressing * in the numeric pad or Ctrl-0. The setting is remembered by domain. For example, if you zoomed a picture in imgur, when you open the next one it will be zoomed (although maybe also scaled down to fit the screen). Of course, with Ctrl+MouseWheel you can quickly change the zoom as well.

If your PC screen text size is set to anything other than 100% (96dpi) internally, then Opera just fscks all your images display. Either use another browser or start opera in 96dpi mode (command line option for launcher is --alt-high-dpi-setting=96)